Automatic graph reproducing device



Sept. 26, 1933- E. DARNHOFER AUTOMATIC GRAPH REPRODUCING DEVICE Filed Aug. 22, 1929 of Which eXtend into the groove-90f thecylin- Patented Sept. "26, 1933 f f;

AUTOMATIC RAPHR P' QDU NGD I M E cnDarnhofergvienna, lap -m e of; Al lflifiattittn August 22 1929; S Ego- 387 e I nd in' Austria Au 3171928.

I Claims. 1

This-invention relates ;to,. a device for auto-v matically and repeatedly reproducing. drawings, w'riting sfand the like which has to satisfy two objectsfirstly to produce a stencil of the draw.-

[5 ingorthe like and secondlyto reproduce by way of this stencil thedrawingor the likeas often as desired. order toproducethe stencil, when H I I ,7

with 'af disc 21 and is' centrally mounted in a' r drawing orv followingfthe lines of the drawing k orwriting, the device divides the movement.

rcarried out thereby into two partial movements and transfers the sarne to a; continuously moving bandinsuch a manner,,that thesarne can be used forreproducing the 'same partial'inove-w ments, which again are combined to producet I v t d Q d v 1 c iproca'ting motion is transmitted tothedisc'2 1 is t e o t pv ment o e p i The particular auxiliary means for attaining this object forinthe subject matter of the present; 2 2 1'1, v i I: r r A By means of the device it'is'p ossibleto fix; drawings or writingjs duringtheir production or subsequently by following, their lines in such: a manner, that they can be repeatedly ,reprodup d a nrrt me. v t I A device constructed according to thetpresent.

way of example I in the; drawings to respect to jthe axis of the said cylinder. v Two sliding rods l2 and 13 are slidably j mounted in the supports. and extend parallelswith respect to' the; cylinder 8 An arm-10,;fixed-tothe 1'od 1'2, and} h an arm 'll rigidly secured to the rod 13, serve 35 asholders of pins-6 and 7-respectively, the points} der {tend move along the same case the sliding rods 12 and 13 are shifted. zS crew-shaped tor sibnand pressure springs l i and 15-are arranged-v I L I 40 on ttherods 12 and 13 in such a manner, that they have the tendency to continuously fiorce-the pins 6 and '7 intothe groove 9 and towards the middle of the cylinder, ;8.; One endof each spring is e u dt i r d wh t he nd the f; isfixed to the correspondingsupport 16.," e I Bymeans: of a rope; or band, passing round a roller 17 and secured to the rodl2, the said rod 12 1s, connected withthe roller 1 '7;;(whic h is ro tatable around the geometric axis 2-5-2 ,and mounted ona shaft in'such a manner," that a forward and backward rotation of the roller l'lcorresponds to eachto and fro movement of the rod, 12. Also the sliding rod 13- is connected th tt u e hed 'a the u o t. -19 in's'ucha manner, that a to and fro movement .t

invention is illustrated diagrammatically and by nected to a rod which is mounted non re-er ofjthe rod 13 results inta corres'ponding fo ward and backward rotation'ofi'the ,sllpportjll l. pjThe latter is rotatably mounted in thetop of a table p; bf saidnt l The" share; '20

rigidly c nnects the N rbnr 1 bal'l bearing of the support'lll, so that the ilatter n th v lme wav s St t iS in n t on it v the transmission of the movement rrom the slid Y meme '12to"the roller lTandflfroTn thsliding of thisarrangement eachmovement of the rod ing-pin' holder 24 is mounted ontheyrod ineans of two eyes 33, and thus .the formerpan 'j turnabout the odza; Howevera stop andscrew at the outer 'endio'f the sliding rod 23 secure the. said holder 2 ijagain'st movement in its" longitu-f din'al direction." h i The endfof the dravving-pini holder 24 is; slightly bent to the side and carriesthe drawing pin lif; Between' the' eyesfi l; the drawing pin holder "241s bent in such a manner, that the" part 4 35 35 extends parallel to the sliding rod 23 '90 and-thus intersects the geometric v axis"2"-2.

Here thefpart 35 35 of; the holder 2fl 'passes throughthe forked enact-or a lever 31 which, by means of its-bearing-pins" 30, isnmounted' in' other end of this lever is enlarged andforms the armature 32 or: an 'electroma'gnet 29. One end ofthetlatter is'connected to a source of current, while the other end of the electromagnet is conrotatable andinsulated in the supports 16. A contact spring 26 is fixed to the rod 25 and rests -on' the cylindr 8,-which consists offanl electri- Thefelectric circuit is I the cylinder tinuously pressed onto' thet cylinder 8 by a spring 38 The pin '37 can be liftedaway from the n me of the device (notillustratedfi The as the'disc 21 and rod 23.

the cylinder 8 by depressing the key 39 of the lever 36.

' A small toothed wheel, the teeth 42 of which project out of the cylinder 8, is centrally and freely rotatable mounted in the cylinder 8 (not illustrated in the drawing).

This device operates in the following manner, when producing a stencil from a drawing or writing.

If a line is drawn or a drawn line is followed by the pencil 1 on the drawing sheet a e f 9, arranged on the area a b c d adapted to be traversed by the said pencil, theslidingrod 23 will be longitudinally shifted as well as turned about the geometric axis 2-2. and further these two component movements are separately transmitted. The longitudinal movement of the rod 23 is transmitted to the disc 21 by means of the, band connecting the two parts and the disc is turned. However .thisturning motion istransformed againinto a straight sliding motion of the sliding rod 12' by means of the shaft 20 andthe roller 17,,because the latter and the rod 12 are connected with each other in the same way The longitudinal movement of the rod 12 is transmitted'tothe pinholder 10 fixed to the said rod and to the pin 6. A

band or tape 3 is slowly and uniformly drawn ,trated), which is subjected to'La slight braking action, and passes by. way of the cylinder-81o another roller. The winding off operation. can

be carried out by handf'or by a springer electrically operated mechanism. l The 1 perforation 41 of the band or tape 3 are engagedby the 'teeth of the toothed wheel 42, projecting out of the cylinder 8, in order to insureanexact lateral.

guidance on the roller. During. the uniform feed of the band 3, the movements of the pin 6 aretraced onthe latter in theshape of .'a curve or' cooperates with one of the said two-ends.

'slig'ht' cut 4. V

In a similar way each turningmovement of the sliding rod 23 around the geometric axis 2- --2 is transmitted tothe sliding rod 13 by means of the bearings 22 of the support 19 andits arm.18,

' because the said rod 13 is also connected with the circular arched end of-the arm 18 by means of the band. Thus during every turning motion of the sliding bar 23, the pin-holder 11 and conshape ofalineor slight cut 5. w I ,4 I l However drawings, writings and so forth do not consist of a'single uninterrupted line, and.

therefore the drawing-pin l has to be guided from the end of oneline to the beginning of the next line without touching the drawing surface. Also these auxiliary movements of the drawing pin have to be rendered visible on the stencil, because the band 3 is uniformly fed during that time. and alsothese auxiliary movements of the drawing-pin are copied. The key-lever 36 .with the pin 37 serves for this object. When drawing or following a line with the drawing-pin 1, the pin 37 is lifted away from the band 3 by depressingthe key 39 by hand. If the drawing-pin 1 is lifted'off of the drawing sheet at the end of a line for carrying out the auxiliary'movement, the key 39 isyreleased and the'spring 38 now forces the pin 37 onto the band 3 and the latter draws a line on or slightly cuts at 40 the said band.

The movements of the drawing-pin 1 are in this way divided on the two borders of the band 3 into radial and into turning movements and copied in the form of two curves 4 and 5 according to a size determined by the proportion of the construction of the device. If the band 3 is fed again in the same direction as before through the device and if thereby the pins 6 and 7 are moved exactly over the two marginal curves 4 and 5, the drawing-pin 1 is compelled to again carry out the same movements as it has been previously the case during the production of the drawing (during the following of the drawing) and of the curves 4 and 5. The two borders are cut away along the curves 4 and 5, in order to render unnecessary the tracing by hand of these curves by the aid of the pins 6 and 7. Now if this band passes over the roller 8, whereby it is exactly laterally guided by the cooperation between the perforations 41 and the toothed wheel 42, the pins 6 and '7 can engage the groove 9 of the cylinder 8' in' consequence of the rotary action of the springs 14 and 15, and the said pins 6, 7 are forced onto the curved edges of the'band 3 by the action of the said springs and consequently exactly follow the course of the curves during the feed of the band 3. V

The following arrangement is provided if it be desired, that the drawing pin 1 is automatically raised from the drawing surface in'case it does not actually draw-a line but carries'out an auxiliary motion. Two overlapping rows of perforations 27, which are staggered with respect to each other, arearranged along the band 3, the saidrows of perforations being interrupted at all those places where the adjacent line 40, produced by the pin '37, is interrupted. However, if desired, the rows of perforations may be uninterrupted and covered with paper at the said places. The two ends of the contact-spring 36 alternately pass through the said double rowof perforations and'engagethe roller 8, so that the latter always the current circuit is'closed by way of the source of current, the roller 8, contact-spring 36, the insulated rod 25, the wire 28, the electromagnet 29 and the other wire 28, connected to the source of current. 'The circuit is closed in case of an interrupted or covered row of perforations, as long as a row of perforations 27 (0mm uncovered place of the row of perforations) passes below the contact-spring 26 during the feed of the band 3 over the cylinder8. Therefore every time a part of the row of perforations 27, corresponding to the lines 40 of the band 3 (thus to the auxiliary movements of the drawing-pin 1) passes over the cylinder 8, the electromagnet 29 attracts its armature 32 and consequently tilts the lever 31' and slightly lifts the forked end 330i the latter. The latter operates the drawing-pin holder 24 and turns the same aboutits two eyes 34, whereby the pin is lifted away from the drawing surface. Thus, during the production of the stencil, if the drawing-pin 1 has carried out an auxiliary movement, the same idly passes over the drawing surface during 'the' reproduction of the drawing or writing by means of the stencil, until the current is interrupted each time at the ends of the rows of perforations 27, the electromagnet' 29 releasing the armature and the pin 1 by its own weight and the weight of the holder 24'again cooperates with the drawing surface in order todraw or follow a new line.

7 '7', when copying a drawing by means of the peh- A'ldouble row ofi'perforations27' has to :be provided for the following reason. During the whole 3-Jwould loose its lateral connection in -v'i'ew1 of the. sometimes. considerable length of the riinesb 4.0 'and:thus the necessityofslits, if it would be;

the. intentionto attain the said object by a single slit and a, single contact-spring 26 passing therethrough. -Thereforefr the sakeof strength, this slithasto be interruptedby webs-andconsequenb 1y a second row'of slitshas to be provided,.whichcompensates the said interruptionsjby ,webs. Thus the slits. havezto' be displaced with: respect to. one another and further they should slightly? overlap; one another in order toprovide for an uninterrupted currentcircuit by means ofthe two-...contact-springsl -26, alternatelyhpaS'sing thro'ughthebandfi. "a

Tlie accuracy: of the reproduction can be con-1 trolled by varying the speed 'of'travel or" band 3, I for'ia given travel of stylus 1, that is, by varying 1 theratio between 'thetwo rates of movement. The drawing area a e'f g mayconsist of a transparentmaterial onlwhichis written or drawn with opaque or colored transparent material.

'may' be rendered opaque by a coat of very fine sand, soot, damp-blacker the like, which the drawing-pin 1 obliterates, wipes off or scrapesfoff during its movement, so that lightlines will appear onadark ground. 2 y

The same drawing but in a reversed sequence of lines'and order, which. is adapted for -adver-- tisernents or announcements, is producedif the stencil passes in the reversed direction through the device in the event of reproducing a draw- The movementscarried out by the pins 6 and oil 1, can be converted into fluctuations of cur rent which, in known manner, can betransrnitted to anyplace either by wire or by wireless. The receiver can use these fluctuations of current either for drawing thetwo lines 4 and 5 on a strip 3 or, in the case of a corresponding slower transmission and suiiiciently strengthened receivvihg current, the same can be used also for conparallel positioned pins, means for transmitting trolling the suitably constructed reproduction device.

Thus a drawingor writing carried out or followed by. the pencil 1 can be simultaneously reproduced by the receiver arrangement; Complete stencils 3 can be transmitted by wireless.

I clairnz '1. Device for dividing the movements following the lines of drawings, writings and the like into two partial movementsand transmitting the latterto a stencil for repeatedly reproducingthe same from said stencil, comprising in cornbina+ tion a lever, bearings, on the lever, a rod slidably arranged in said bearings, a drawing pencil connected with said sliding rod, a shaft passing through said lever, a disc on the shaft in operative turning engagement with the sliding'rod, the lon- 'gitudinal movement of the sliding rod being converted into opposite rotations respectively of said disc, a roller secured to said shaft, a' slotted extension secured to said lever and adapted to receive turning motion from the latter, a pair of and converting the movements of said roller and slotted extension into straight transverse movement in the respective parallel pins, and a uni- .,,forn1ly fed band operated on by the said pins.

" 2. Device for dividing the movements followas the linesiof drawings, writings and the'dike into two partial movements and transmitting the lattcnto a stencil for. repeatedly reproducing thev same from said stencil, ."comprising incombinae tion a 1ever,bearings on the lever,=a rod'slida'olyl' arranged in'said bearings, aIdrawing-pencilv corp j nected with said sliding rod, a shaft passing through saidleveigfa disc onthe shaftinoper ative turning engagement with thesaid s'lidi'iigl rod; the jlengitudinal movement of. the sliding rod being converted into respective directions of i I rotation of said disc}auroller secured to said raft, a slotted extension secured to said lever adapted to receive turningii'iotionjfrom the lat-- ter, a sliding rod in engagement with Isaidroller; 9Q a'pin secured to this sliding'rod, anothersliding rod inflengage nent with, said slotted extension, a pin secured tothe sliding rodlast mentioned, a cylinder iu'iderneath thesaid pins, there being a groove'insaid' cylinder wherein the said: pins operate. 3. Deviceas claimed in claim :1"'inlwhicl'r the ment on theband in order, to form astencilij i. Device .for dividing the movements follows ingthelines'of drawings, writings and thelike. intdtWopartial movements; comprising in com bination' a uniformly fed stencil, pins cooperating with said stencil, a roller to which the movement of one, of said pins is imparted, a lever providedwith an extension to which the moveent of theother pinis transmitted, a disc con- 7 -nected'with said roller; a sliding rod in operative engagement with said disc, a lever in which said rod slidably arranged, aconnection between the second pin and said lever and a drawing pencil connected with" said sliding rod. 5. Device as claimed in claim 1 further comprising a drawing-pencil holder mounted on the sliding rod, a part ofthe holder extending parallel f to said sliding rod, and a lever engaging the said holderfl 61A reproducing device for actuating a pencil-v to draw a graph consisting of a'continuous or. in-

terrupted linecomprising a matrix formedbya band, the opposite edges. of Whichcontrol the movements of the pencil and correspond to the res ective components of the points on the graph executed by said pencil. g g

7. A device asclaimed in claim l'in which the uniformly fed band has its marked edges removed, and means for urging each parallel pin' against its respective edge to automatically follow along said band edges for tl epurpose of operating the pencil and reproducing a graph; 1

8. A device for Writing characters, comprising, .incombination with a. writingmemben a stripshaped control member, the, edges of which are curved corresponding tothe, components of the characters to be written down. f

, 9. A device for writing characters, and thelike, I 1 comprising, in combination with a writing memher, a strip-shapedcontrol member, the edges of which are curved corresponding to the components', of the characters to be writtendownand which has longitudinal rows of perforations, and nieansadjacent said strip co-acting with said perforations to lift and lower in turn said writing member.

10. A, device for writing characters, and the like, comprising, in combination with a'writingj member, a strip-shaped control member,- the. I edges of which are curved corresponding to the components of the characters to be written down,

a device controlled by one edge of said controlpins [mark the two cernponentsofeach "m e- Y 15c1: v u

member; an axle connected with said device; an

arm extending from said axle'for moving said writing member inthe direction of one of the two components; a rod slidingly combined with said arm and being connected with the said writing member and adapted to move it in the direction of the other component, and means connecting saidrod to 'be controlled by the other edge of said control-member. g

11. A device for writing characters, and the like, comprising, in combination with a writing member, a strip-shaped control member, the edges of which are curved corresponding to the components of the characters to be written, an axle, an arm extending from said axle; and being connected with said writing member, a rod arranged in said arm and being longitudinally shiftable therein and connected at its free end with said writing member; means for holding this latter in operative position, said arm being turned in dependency of one of said components and said rod being shifted in dependency of the other of the said vcomponents, substantially as set forth.

12. A device for writing characters and the like comprising, in combination with a writing member, a strip-shaped control member, the edges of which are curved corresponding to the components of the characters to be written down, said strip-shaped control member having perforations therein, and a toothed disk, the teeth of which engage the perforations of the strip-shaped control member.

13. Mechanism for writing characters compris ing, a writing member, a strip-shaped control member having curved edges corresponding to the components of the characters to be written down. devices having elements thereon in engagement with the edges of said strip-shaped control member, and means associated with said devices for transmitting the movement of the devices to the writing member. s

14. A device for writingcharacters comprising, a writing member, a strip-shaped control member having curved edges corresponding to the components of the character to be written down, devices having elements thereon in engagement with the respective edges of the strip-shaped control member, means associated with said devices for transmitting the movement of the levers to the writing member, and means for preventing lateral deviation of the strip-shaped control member.

EGON DARNHOFER. 

